Dear Wael: she is three years older than me, is it wrong?

“Dear Wael: I’ve known this girl for a few years now and I wish to marry her. But the problem is that many think it’s wrong that she is 3 years older than me. I love her very deeply and I believe she does too, but she’d never betray her family and friends. What i want to know is that is it lawful for a Muslim girl who is 3 years older to marry a Muslim boy?” – Matt